*/
#include "monitor.h"
-#include "qjson.h"
-#include "qint.h"
#include "cpu-common.h"
#include "kvm.h"
#include "balloon.h"
#include "trace.h"
+#include "qmp-commands.h"
static QEMUBalloonEvent *balloon_event_fn;
static QEMUBalloonStatus *balloon_stat_fn;
return 1;
}
-static int qemu_balloon_status(MonitorCompletion cb, void *opaque)
+static int qemu_balloon_status(BalloonInfo *info)
{
if (!balloon_stat_fn) {
return 0;
}
- balloon_stat_fn(balloon_opaque, cb, opaque);
+ balloon_stat_fn(balloon_opaque, info);
return 1;
}
-static void print_balloon_stat(const char *key, QObject *obj, void *opaque)
+BalloonInfo *qmp_query_balloon(Error **errp)
{
- Monitor *mon = opaque;
-
- if (strcmp(key, "actual")) {
- monitor_printf(mon, ",%s=%" PRId64, key,
- qint_get_int(qobject_to_qint(obj)));
- }
-}
-
-void monitor_print_balloon(Monitor *mon, const QObject *data)
-{
- QDict *qdict;
-
- qdict = qobject_to_qdict(data);
- if (!qdict_haskey(qdict, "actual")) {
- return;
- }
- monitor_printf(mon, "balloon: actual=%" PRId64,
- qdict_get_int(qdict, "actual") >> 20);
- qdict_iter(qdict, print_balloon_stat, mon);
- monitor_printf(mon, "\n");
-}
-
-/**
- * do_info_balloon(): Balloon information
- *
- * Make an asynchronous request for balloon info. When the request completes
- * a QDict will be returned according to the following specification:
- *
- * - "actual": current balloon value in bytes
- * The following fields may or may not be present:
- * - "mem_swapped_in": Amount of memory swapped in (bytes)
- * - "mem_swapped_out": Amount of memory swapped out (bytes)
- * - "major_page_faults": Number of major faults
- * - "minor_page_faults": Number of minor faults
- * - "free_mem": Total amount of free and unused memory (bytes)
- * - "total_mem": Total amount of available memory (bytes)
- *
- * Example:
- *
- * { "actual": 1073741824, "mem_swapped_in": 0, "mem_swapped_out": 0,
- * "major_page_faults": 142, "minor_page_faults": 239245,
- * "free_mem": 1014185984, "total_mem": 1044668416 }
- */
-int do_info_balloon(Monitor *mon, MonitorCompletion cb, void *opaque)
-{
- int ret;
+ BalloonInfo *info;
if (kvm_enabled() && !kvm_has_sync_mmu()) {
- qerror_report(QERR_KVM_MISSING_CAP, "synchronous MMU", "balloon");
- return -1;
+ error_set(errp, QERR_KVM_MISSING_CAP, "synchronous MMU", "balloon");
+ return NULL;
}
- ret = qemu_balloon_status(cb, opaque);
- if (!ret) {
- qerror_report(QERR_DEVICE_NOT_ACTIVE, "balloon");
- return -1;
+ info = g_malloc0(sizeof(*info));
+
+ if (qemu_balloon_status(info) == 0) {
+ error_set(errp, QERR_DEVICE_NOT_ACTIVE, "balloon");
+ qapi_free_BalloonInfo(info);
+ return NULL;
}
- return 0;
+ return info;
}
/**
#define _QEMU_BALLOON_H
#include "monitor.h"
+#include "qapi-types.h"
typedef void (QEMUBalloonEvent)(void *opaque, ram_addr_t target);
-typedef void (QEMUBalloonStatus)(void *opaque, MonitorCompletion cb,
- void *cb_data);
+typedef void (QEMUBalloonStatus)(void *opaque, BalloonInfo *info);
int qemu_add_balloon_handler(QEMUBalloonEvent *event_func,
QEMUBalloonStatus *stat_func, void *opaque);
void qemu_remove_balloon_handler(void *opaque);
-void monitor_print_balloon(Monitor *mon, const QObject *data);
-int do_info_balloon(Monitor *mon, MonitorCompletion cb, void *opaque);
int do_balloon(Monitor *mon, const QDict *params,
MonitorCompletion cb, void *opaque);
qapi_free_SpiceInfo(info);
}
+void hmp_info_balloon(Monitor *mon)
+{
+ BalloonInfo *info;
+ Error *err = NULL;
+
+ info = qmp_query_balloon(&err);
+ if (err) {
+ monitor_printf(mon, "%s\n", error_get_pretty(err));
+ error_free(err);
+ return;
+ }
+
+ monitor_printf(mon, "balloon: actual=%" PRId64, info->actual >> 20);
+ if (info->has_mem_swapped_in) {
+ monitor_printf(mon, " mem_swapped_in=%" PRId64, info->mem_swapped_in);
+ }
+ if (info->has_mem_swapped_out) {
+ monitor_printf(mon, " mem_swapped_out=%" PRId64, info->mem_swapped_out);
+ }
+ if (info->has_major_page_faults) {
+ monitor_printf(mon, " major_page_faults=%" PRId64,
+ info->major_page_faults);
+ }
+ if (info->has_minor_page_faults) {
+ monitor_printf(mon, " minor_page_faults=%" PRId64,
+ info->minor_page_faults);
+ }
+ if (info->has_free_mem) {
+ monitor_printf(mon, " free_mem=%" PRId64, info->free_mem);
+ }
+ if (info->has_total_mem) {
+ monitor_printf(mon, " total_mem=%" PRId64, info->total_mem);
+ }
+
+ monitor_printf(mon, "\n");
+
+ qapi_free_BalloonInfo(info);
+}
+
void hmp_quit(Monitor *mon, const QDict *qdict)
{
monitor_suspend(mon);
void hmp_info_blockstats(Monitor *mon);
void hmp_info_vnc(Monitor *mon);
void hmp_info_spice(Monitor *mon);
+void hmp_info_balloon(Monitor *mon);
void hmp_quit(Monitor *mon, const QDict *qdict);
void hmp_stop(Monitor *mon, const QDict *qdict);
void hmp_system_reset(Monitor *mon, const QDict *qdict);
#include "virtio.h"
#include "pc.h"
#include "cpu.h"
-#include "monitor.h"
#include "balloon.h"
#include "virtio-balloon.h"
#include "kvm.h"
-#include "qlist.h"
-#include "qint.h"
-#include "qstring.h"
#if defined(__linux__)
#include <sys/mman.h>
#endif
-/* Disable guest-provided stats by now (https://bugzilla.redhat.com/show_bug.cgi?id=623903) */
-#define ENABLE_GUEST_STATS 0
-
-
typedef struct VirtIOBalloon
{
VirtIODevice vdev;
uint64_t stats[VIRTIO_BALLOON_S_NR];
VirtQueueElement stats_vq_elem;
size_t stats_vq_offset;
- MonitorCompletion *stats_callback;
- void *stats_opaque_callback_data;
DeviceState *qdev;
} VirtIOBalloon;
for (i = 0; i < VIRTIO_BALLOON_S_NR; dev->stats[i++] = -1);
}
-static void stat_put(QDict *dict, const char *label, uint64_t val)
-{
- if (val != -1)
- qdict_put(dict, label, qint_from_int(val));
-}
-
-static QObject *get_stats_qobject(VirtIOBalloon *dev)
-{
- QDict *dict = qdict_new();
- uint64_t actual = ram_size - ((uint64_t) dev->actual <<
- VIRTIO_BALLOON_PFN_SHIFT);
-
- stat_put(dict, "actual", actual);
-#if ENABLE_GUEST_STATS
- stat_put(dict, "mem_swapped_in", dev->stats[VIRTIO_BALLOON_S_SWAP_IN]);
- stat_put(dict, "mem_swapped_out", dev->stats[VIRTIO_BALLOON_S_SWAP_OUT]);
- stat_put(dict, "major_page_faults", dev->stats[VIRTIO_BALLOON_S_MAJFLT]);
- stat_put(dict, "minor_page_faults", dev->stats[VIRTIO_BALLOON_S_MINFLT]);
- stat_put(dict, "free_mem", dev->stats[VIRTIO_BALLOON_S_MEMFREE]);
- stat_put(dict, "total_mem", dev->stats[VIRTIO_BALLOON_S_MEMTOT]);
-#endif
-
- return QOBJECT(dict);
-}
-
static void virtio_balloon_handle_output(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOBalloon *s = to_virtio_balloon(vdev);
}
}
-static void complete_stats_request(VirtIOBalloon *vb)
-{
- QObject *stats;
-
- if (!vb->stats_opaque_callback_data)
- return;
-
- stats = get_stats_qobject(vb);
- vb->stats_callback(vb->stats_opaque_callback_data, stats);
- qobject_decref(stats);
- vb->stats_opaque_callback_data = NULL;
- vb->stats_callback = NULL;
-}
-
static void virtio_balloon_receive_stats(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOBalloon *s = DO_UPCAST(VirtIOBalloon, vdev, vdev);
s->stats[tag] = val;
}
s->stats_vq_offset = offset;
-
- complete_stats_request(s);
}
static void virtio_balloon_get_config(VirtIODevice *vdev, uint8_t *config_data)
return f;
}
-static void virtio_balloon_stat(void *opaque, MonitorCompletion cb,
- void *cb_data)
+static void virtio_balloon_stat(void *opaque, BalloonInfo *info)
{
VirtIOBalloon *dev = opaque;
- /* For now, only allow one request at a time. This restriction can be
- * removed later by queueing callback and data pairs.
+#if 0
+ /* Disable guest-provided stats for now. For more details please check:
+ * https://bugzilla.redhat.com/show_bug.cgi?id=623903
+ *
+ * If you do enable it (which is probably not going to happen as we
+ * need a new command for it), remember that you also need to fill the
+ * appropriate members of the BalloonInfo structure so that the stats
+ * are returned to the client.
*/
- if (dev->stats_callback != NULL) {
- return;
- }
- dev->stats_callback = cb;
- dev->stats_opaque_callback_data = cb_data;
-
- if (ENABLE_GUEST_STATS
- && (dev->vdev.guest_features & (1 << VIRTIO_BALLOON_F_STATS_VQ))) {
+ if (dev->vdev.guest_features & (1 << VIRTIO_BALLOON_F_STATS_VQ)) {
virtqueue_push(dev->svq, &dev->stats_vq_elem, dev->stats_vq_offset);
virtio_notify(&dev->vdev, dev->svq);
return;
}
+#endif
/* Stats are not supported. Clear out any stale values that might
* have been set by a more featureful guest kernel.
*/
reset_stats(dev);
- complete_stats_request(dev);
+
+ info->actual = ram_size - ((uint64_t) dev->actual <<
+ VIRTIO_BALLOON_PFN_SHIFT);
}
static void virtio_balloon_to_target(void *opaque, ram_addr_t target)
.args_type = "",
.params = "",
.help = "show balloon information",
- .user_print = monitor_print_balloon,
- .mhandler.info_async = do_info_balloon,
- .flags = MONITOR_CMD_ASYNC,
+ .mhandler.info = hmp_info_balloon,
},
{
.name = "qtree",
.user_print = do_pci_info_print,
.mhandler.info_new = do_pci_info,
},
- {
- .name = "balloon",
- .args_type = "",
- .params = "",
- .help = "show balloon information",
- .user_print = monitor_print_balloon,
- .mhandler.info_async = do_info_balloon,
- .flags = MONITOR_CMD_ASYNC,
- },
{ /* NULL */ },
};
##
{ 'command': 'query-spice', 'returns': 'SpiceInfo' }
+##
+# @BalloonInfo:
+#
+# Information about the guest balloon device.
+#
+# @actual: the number of bytes the balloon currently contains
+#
+# @mem_swapped_in: #optional number of pages swapped in within the guest
+#
+# @mem_swapped_out: #optional number of pages swapped out within the guest
+#
+# @major_page_faults: #optional number of major page faults within the guest
+#
+# @minor_page_faults: #optional number of minor page faults within the guest
+#
+# @free_mem: #optional amount of memory (in bytes) free in the guest
+#
+# @total_mem: #optional amount of memory (in bytes) visible to the guest
+#
+# Since: 0.14.0
+#
+# Notes: all current versions of QEMU do not fill out optional information in
+# this structure.
+##
+{ 'type': 'BalloonInfo',
+ 'data': {'actual': 'int', '*mem_swapped_in': 'int',
+ '*mem_swapped_out': 'int', '*major_page_faults': 'int',
+ '*minor_page_faults': 'int', '*free_mem': 'int',
+ '*total_mem': 'int'} }
+
+##
+# @query-balloon:
+#
+# Return information about the balloon device.
+#
+# Returns: @BalloonInfo on success
+# If the balloon driver is enabled but not functional because the KVM
+# kernel module cannot support it, KvmMissingCap
+# If no balloon device is present, DeviceNotActive
+#
+# Since: 0.14.0
+##
+{ 'command': 'query-balloon', 'returns': 'BalloonInfo' }
+
##
# @quit:
#
EQMP
+ {
+ .name = "query-balloon",
+ .args_type = "",
+ .mhandler.cmd_new = qmp_marshal_input_query_balloon,
+ },
projects / qemu.git / commitdiff